Improvement in box stereoscopes



4. -ssheetsnshem WILLIAM M. KOHL.

lmprvemen't in Box-Sereoscopes. NOL 114,829. Patented May16,1871.

3 Shams-Sheet 2. WILLlAMAM. KOHL.

Improvement in Box-Stereoscopes.

Patnted May 16 y 3Sheets-SheeI3. WILLIAM M. KOHL.

Y Improvement in Box-Stereoscopes. N0. II4I829, Patented MayI6,l87I.

un Mmm mmm/wle ca M x {DSM/W55 FRONSSJ tttiit ittet WILLIAM M. Koni., orcINcINNArI, ponto.

Letters Patent No; 114,829, dated May 16, 1871.

IMPROVEMENT IN BOX STEREOSCOPES.

The schedule referred m nieuwe Let-rm Parent and making pan of the um.

To all 'whom 'it 'may concern Be it known that I, WILLIAM M. Kenn, of Cincinnati, in the countyl of Hamilton and State of Ohio, have invented a new and useful Improvement in Stereoscope's'; and Ido hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same,'reference being had to the accompanying *draws ing forming part of this specification.

This invention relates to improvements in stereoscpes, and consists in the application within the main case of a sliding case for holding the views and a se.- lccting and elevating apparatus, so arranged that the pictures will always be raised in the focus of the lenses, the case containing the pictures being moved by the selecting and elevating apparatus `so as to take one picture after another, and the 'said apparatus is arranged to reverse the.movcment of the picture-case `when it has passed completely along the said apparatus 'either way, all as hereinafter specified.

Figure l is a sectional elevation of my improved apparatus taken on the line :c :c of fig. 2, and with the sliding Apicture-case removed;

Figure 2 is a top view, partly sectioned;

Figure 3 is a section on'the'line y y of iig. 2; and.'

vFigurefi is a section on the line z a of fig. 2.

Similarletters of reference indicate corresponding parts.

vA 1s the main or exterior case, in which the views and the operatingiapparatus are contained.

Brepresents the lenses.

. C is a frame, mounted in case A below thelenses, for supporting the sliding box holding the views, and has a sliding carriage, D, mounted on it which works back and forth from side to side in the direction of the line of vision.

This carriage is provided with cogs, E, at one side, by'which it is moved back and forth, as will be presently described. y

F is the case for containing the views. It is made preferably of thin sheet metal, and has grooves G on the inner walls of two opposite sides for holding the views H separate from each other.

This case, containing any approved number of these views, is placed on the carriage D, which has flanges l at the corners to prevent it from slipping off when moved back and forth, and the pictures are raised one at a time by the bars K, mounted on the shaft L, which is mounted'in the vertically-sliding plates M, which are arranged to slide on theV rods N, and have stud-pins O projecting through the vertical slot P in the sides of the case A, and carrying the knobs or handles Q, by which the motion for lthe machineis applied by the hands.

The upper ends of the bars K are wedge-shaped for passinginto the spaces between the cogs E, also into the grooves G.

One of these bars isplaced in a slotted projection, R, which passes through the slot of plate Maud fits it closely from the bottom up to point V, the slot widening after leaving the point V, as shown in iig. 1. When the plate S tends. to incline either way it is thrown, bythe Obliquity of the walls, into a vertical line.

Above the slot in plate M is a cam-plate, V, pivoted at WV, with the point hanging downward, the sides of which are beveled in opposite directions alike.

Above the pivotW is a point, X',on which a spring, Y, bears, so as to hold the cam-plate in anyposition to which it may be adjusted.

Z represents stud-pins projecting from plate M, one on each side of the cam-plate, for limiting its move' ment on either side.

` a' is a vibrator', pivoted to plate M atb, within a large opening in thecam-plate. This vibrator carries a stud-pin, d', inthe upper end, which is to be struck byone of the bars c of the carriage D near the end of each movement of the latter, and shifted previous to the stopping of the carriage to the opposite side of pivot W, for shifting the .point of cam V, the lower end of thevibrator being engaged with thel cam so asK tomove it from side to side'in the direction opposite to the movement of stud-pin d.

When the plates M are shoved down by the operator, this cam-plate V, being'turned to one side or the other of the vertical-line, will strike against the pointed top f (one side or the other, as the case maybe) of the bar S, and (the projection R being at that time in the wide part of the slot of plate M) push it and the upper ends of bars K asfar to one side ofthe verticalv l line as the distance from center to center of the spaces between the cogs E.

When 'the plates M are raised one of the bars K will be brought up into one of the grooves G at one side of the vertical' plane of shaft L, and one of them into .the corresponding notch between the cogsA E, the plates M being raised again and the oneof the oblique walls g of the slot being brought against the projection 1t and swinging plate S into the vertical line; thev bars K also will be caused to swing into the vertical line and move the carriage D and case l along one notch; at the same time the bars Krise up under one of the views and raise it up in front of the lenses, as indicated at h, g. 3.

For preventing the view from tilting one side or the other, the grooved guides 'i are arranged in the case A for the reception 'of the same, and these guides are connected to the cross-bar k andmade detachable to admit of readily taking out the case F, and foroth'er purposes.

It is highly desirableto havea simple and efficientv means of holding the lifting apparatus, with the views lifted by it, which shall not require any attention for connecting vand disconnecting with the said apparatus for taking hold when raised up 'and letting go when it is required to let the view fall back again. o

For this'purpo'se I have provided a strong spring, l, at the bottom ofthe case, on an oblique support, m, which spring has a notch, n, in which the end p of an arm, q, engages when the lifting apparatus is at the end ofthe upward movement, and is held by the. lower wall fr of the notch and the pressure of' the spring.

baid arm q is mounted on the shalt s, which has arms t, connected with the stud-pins O by the links u, by which the shaft is oscillated when the lifting apparat-us is raised and the end of arm q thrown into the notch. A gentle downward pressure on the knobs Q forces the said arm out of the notch and admits of instantly disengaging the lifting apparatus to letthe picture fall. y The spring is provided with a cushion at y, and another cushion, i is arranged on the wall of `the case for the arm q to strike against at the end` of either movement to prevent noise and jarring.

By means of this sliding case and raising apparatus the views are always kept in exact focus, they are not required to be handled, and there is much less danger of breaking glass Views.

Of course the case containing the views may be moved by other means. For instance, a ratchet and pawl, the ratchet being on the case or carriage and the pawl being actuated by the sliding plates Mz or any other moving part.

Or, a rotary shaft, having a piniongearng with the carriage, may be used, on which may be a ratchetwheel, arranged to be struck by a pawl or projection on the sliding plates, or one of them, just previous to the arrival at the bottom of the downward movement.

Ido not, therefore, limit myself to the arrangement here shown for moving the case F.

`Having thu's ldescribed my invention,

I claim as new and desire to secure by Letters Patent- 1. The application to a stereoscope, in the manner described, oi' the shifting-cam V (on tilting-bar) and projections e, (on carriage,) when c'ombined for the purpose set forth.

2. The application to a stereoscope, in the manner described, ot' lifting-bars K, sliding plates M, vibratf ing-arm q, and notched spring 1', when combined for the purpose set forth. ,o

3. The carriage D, case F, vibrating lift-bars K, slotted plates M, bar S, projection R, and cam V, when combined and applied to a stereoscope in the manner described.

W.- M. KOHL.`

Witnesses:

BENJ. O. TRUE,` J. E. GORMANY. 

